We have published an update for Peg Solitaire. From now on, you can undo the last move you have made! The update is already live on Android and it will soon be published for iOs and Windows Phone too. By the way, while the game is being played alot; there is no one who has successfuly completed the last level.
We will keep working on new updates and will soon come up with different levels and new surprises! Thanks for your attention:)